On linux, Hermes has a transparent window and/or shows strange artefacts
This can be caused by having desktop effects enabled on your linux system. To determine if this is the cause, please disable desktop effects and see if Hermes launches properly.
If it does, then you can eliminate the problem even with desktop effects enabled by editing the script run_application.sh and add the line
XLIB_SKIP_ARGB_VISUALS=1; export XLIB_SKIP_ARGB_VISUALS
somewhere before the end.